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DC Field | Value | Language |
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dc.citation.endPage | 326 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 316 | - |
dc.citation.title | MACROMOLECULES | - |
dc.citation.volume | 54 | - |
dc.contributor.author | Park, So Yeong | - |
dc.contributor.author | Jeong, Hyeon U | - |
dc.contributor.author | Choi, Chungryong | - |
dc.contributor.author | Jang, Junho | - |
dc.contributor.author | Kim, Eunseol | - |
dc.contributor.author | Seo, Yeseong | - |
dc.contributor.author | Lee, Jaeyong | - |
dc.contributor.author | Kim, Jin Kon | - |
dc.contributor.author | Kim, Jaeup U. | - |
dc.date.accessioned | 2023-12-21T16:36:40Z | - |
dc.date.available | 2023-12-21T16:36:40Z | - |
dc.date.created | 2020-12-18 | - |
dc.date.issued | 2021-01 | - |
dc.description.abstract | We investigated, via atomic force microscopy and field-emission scanning electron microscopy, the thin-film morphology of six-arm star-shaped poly(methyl methacrylate)-b-polystyrene [(PMMA-b-PS)(6)] with the volume fraction of PS block of similar to 0.5. At smaller molecular weight (M) but higher than the critical molecular weight (M-crit) above which block copolymers start to microphase-separate, the thin-film morphology greatly depends on the surface tension at the air side when a substrate has preferential interaction with one block (PMMA). For a near-neutral air surface, interesting tube-like nanostructures, instead of vertically oriented lamellae, were formed at the top of the film, while a PMMA layer was formed on the bottom film, contacting the silicon substrate with a native oxide. This is because the combination of vertical and parallel lamellae generates a huge energy penalty at the T-junction connecting these two different lamellar orientations. Tube-like nanostructures were also formed on other substrates that are preferential to one block, for instance, gold or a substrate grafted by a PS brush, when the film thickness does not meet the commensurability. On the other hand, when M is much higher than M-crit, vertical lamellae were formed throughout the entire film thickness. The self-consistent field theory supported the experimental findings. | - |
dc.identifier.bibliographicCitation | MACROMOLECULES, v.54, no.1, pp.316 - 326 | - |
dc.identifier.doi | 10.1021/acs.macromol.0c02384 | - |
dc.identifier.issn | 0024-9297 | - |
dc.identifier.scopusid | 2-s2.0-85099136574 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/49004 | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acs.macromol.0c02384 | - |
dc.identifier.wosid | 000610997800029 | - |
dc.language | 영어 | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Thin-Film Morphology of Symmetric Six-Arm Star-Shaped Poly(methyl methacrylate)-block-Polystyrene Copolymers | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | BLOCK-COPOLYMERS | - |
dc.subject.keywordPlus | MICROPHASE SEPARATION | - |
dc.subject.keywordPlus | NEUTRALIZATION | - |
dc.subject.keywordPlus | ORIENTATION | - |
dc.subject.keywordPlus | STABILITY | - |
dc.subject.keywordPlus | BULK | - |
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